A new bridge across the Hawkesbury river at Windsor is being started on this year, to be completed within 18 months. It'll be higher, so less of a climb into Windsor (but then less of a downhill when leaving Windsor, of course), and will have a walkway either side and a separate cycleway.
http://www.hawkesburygazette.com.au/new ... 26684.aspx
I hope they can eventually join the Windsor end of the Windsor Rd shared path to it.

